Added scanning barcodes with a camera
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# Quagga2 Documentation
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Welcome to the Quagga2 documentation! Quagga2 is a JavaScript barcode scanner library supporting real-time location (localization) and decoding of various barcode types in both browser and Node.js environments.
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[](https://gitter.im/quaggaJS/Lobby?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
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## Quick Links
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- [GitHub Repository](https://github.com/ericblade/quagga2)
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- [Changelog](https://github.com/ericblade/quagga2/releases)
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- [npm Package](https://www.npmjs.com/package/@ericblade/quagga2)
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- [Live Examples](examples/)
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## Getting Started
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New to Quagga2? Start here:
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- **[Installation & Quick Start](getting-started.md)** - Get up and running in minutes
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---
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## Documentation Structure
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This documentation follows the [Divio Documentation System](https://documentation.divio.com/), organizing content into four types based on what you need:
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### 📚 [Tutorials](tutorials/) - *Learning-oriented*
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Step-by-step lessons to help you learn by doing. Perfect if you're just getting started.
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- [Your First Barcode Scan](tutorials/first-scan.md) - Scan barcodes with your camera
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- [Decoding Static Images](tutorials/static-image.md) - Process image files
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- [Using with React](tutorials/react-integration.md) - React integration guide
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- [Using with Node.js](tutorials/node-usage.md) - Server-side barcode scanning
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### 🛠️ [How-To Guides](how-to-guides/) - *Task-oriented*
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Practical guides for accomplishing specific goals. Use these when you have a problem to solve.
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- [Configure Barcode Readers](how-to-guides/configure-readers.md) - Select which barcode types to scan
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- [Optimize Performance](how-to-guides/optimize-performance.md) - Improve speed and accuracy
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- [Handle Difficult Barcodes](how-to-guides/handle-difficult-barcodes.md) - Deal with poor lighting, rotation, etc.
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- [Use Debug Flags](how-to-guides/use-debug-flags.md) - Enable diagnostic output
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- [Create External Readers](how-to-guides/external-readers.md) - Build custom barcode decoder plugins
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### 📖 [Reference](reference/) - *Information-oriented*
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Technical descriptions and API documentation. Look here when you need precise details.
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- [API Documentation](reference/api.md) - Complete API reference
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- [Configuration Options](reference/configuration.md) - All config parameters explained
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- [Camera Access API](reference/camera-access.md) - Camera control methods
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- [Supported Barcode Types](reference/readers.md) - Available decoders
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- [Browser Support](reference/browser-support.md) - Compatibility information
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- [Dependencies](reference/dependencies.md) - Package dependencies explained
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### 💡 [Explanation](explanation/) - *Understanding-oriented*
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Background, context, and deeper understanding. Read these to learn *why* things work the way they do.
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- [How Barcode Localization Works](explanation/how-barcode-localization-works.md) - The algorithm behind barcode detection
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- [Algorithm Overview](explanation/algorithm-overview.md) - Image processing pipeline
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- [Architecture](explanation/architecture.md) - Code structure and design decisions
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---
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## Additional Resources
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- [Contributing Guide](contributing.md) - How to contribute to Quagga2
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- [Gitter Chat](https://gitter.im/quaggaJS/Lobby) - Ask questions and get help
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---
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## Framework Integration
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Using Quagga2 with a specific framework?
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- **React**: [quagga2-react-example](https://github.com/ericblade/quagga2-react-example/) and [quagga2-redux-middleware](https://github.com/ericblade/quagga2-redux-middleware/)
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- **Angular**: [ngx-barcode-scanner](https://github.com/julienboulay/ngx-barcode-scanner) or [mobile-scanning-demo](https://github.com/classycodeoss/mobile-scanning-demo)
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- **Vue 2**: [vue-quagga-2](https://github.com/DevinNorgarb/vue-quagga-2)
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- **Vue 3**: [vue3-quagga-2](https://github.com/nick-0101/vue3-quagga-2)
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- **ThingWorx**: [ThingworxBarcodeScannerWidget](https://github.com/ptc-iot-sharing/ThingworxBarcodeScannerWidget)
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---
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## External Readers and Other Related Projects {#external-readers}
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- **DataMatrix Reader**: [hackathi/quagga2-reader-datamatrix](https://github.com/hackathi/quagga2-reader-datamatrix)
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- **QR Code Reader**: [ericblade/quagga2-qr-code-reader](https://github.com/ericblade/quagga2-qr-code-reader)
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- **PDFBarcodeJS**: [rexshijaku/PDFBarcodeJS](https://github.com/rexshijaku/PDFBarcodeJS)
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---
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## Who Uses Quagga2? {#who-uses}
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Quagga2 is used by developers worldwide in various applications, including inventory management, retail point-of-sale systems, library systems, and mobile scanning apps. If you're using Quagga2 in your project, let us know!
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- **Internet Archive Open Library**: [internetarchive/openlibrary](https://github.com/internetarchive/openlibrary)
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- **Grocy**: [grocy/grocy](https://github.com/grocy/grocy)
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- **German Federal Agency For Technical Relief**: [mziech/thw-inventory](https://github.com/mziech/thw-inventory)
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- **Food Coop Shop**: [foodcoopshop/foodcoopshop](https://github.com/foodcoopshop/foodcoopshop)
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- **Rintagi**: [Rintagi/Low-Code-Development-Platform](https://github.com/Rintagi/Low-Code-Development-Platform)
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- **LINE**: [line/line-api-use-case-smart-retail](https://github.com/line/line-api-use-case-smart-retail)
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- **Veganify**: [frontendnetwork/veganify](https://github.com/frontendnetwork/veganify)
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- **Appsemble**: [Appsemble](https://gitlab.com/appsemble/appsemble)
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- **Intake24**: [intake24/intake24](https://github.com/intake24/intake24)
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- **FridgeToPlate**: [COS301-SE-2023/FridgeToPlate](https://github.com/COS301-SE-2023/FridgeToPlate)
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- **Nutri-Scanner**: [kishan9535/Nutri-Scanner](https://github.com/kishan9535/Nutri-Scanner)
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- **Musclog**: [blopa/musclog-app](https://github.com/blopa/musclog-app)
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---
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## About This Documentation
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This documentation is maintained alongside the Quagga2 codebase. If you find errors or have suggestions for improvement, please [open an issue](https://github.com/ericblade/quagga2/issues) or submit a pull request.
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**Last Updated**: November 2025
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